body {
  background: #222d32;
}
.login_panel {
  width: 350px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 25%;
  border: none;
}
.login_panel .panel-heading {
  background: #337ab7;
  font-size: 24px;
  color: #fff;
  text-align: center;
}
.login_panel .panel-body .form-horizontal .but1 {
  margin-right: 55px;
}
